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Full-Text Articles in Chemistry
An Investigation Of The Isotopic Exchange Of Arsenic Atoms Between Arsenic(Iii) And Arsenic(V) In Aqueous Hydrochloric Acid Solutions, Lewis L. Anderson
An Investigation Of The Isotopic Exchange Of Arsenic Atoms Between Arsenic(Iii) And Arsenic(V) In Aqueous Hydrochloric Acid Solutions, Lewis L. Anderson
Chemistry and Chemical Biology ETDs
A spectrophotometric investigation was initiated in order to provide additional evidence for the existence of chemically nonequivalent species of arsenic(V) in 10.9 f hydrochloric acid solution.
Phase Equilibria In Fused Salt Systems: Binary Systems Of Plutonium(Iii) Chloride With The Chlorides Of Magnesium, Calcium Strontium, And Barium, Karl W. R. Johnson
Phase Equilibria In Fused Salt Systems: Binary Systems Of Plutonium(Iii) Chloride With The Chlorides Of Magnesium, Calcium Strontium, And Barium, Karl W. R. Johnson
Chemistry and Chemical Biology ETDs
Fused salt systems containing oxides have received the most attention to date, because of their occurrence in minerals and ores and their application to ceramics. The next most widely studied of group of compounds are the metal halides, particularly the metal chlorides. Despite the fact that many of the metal chlorides are hygroscopic, the salts lend themselves to experimentation because a large majority undergo stable solid-liquid transformations below 1000 degrees C, are generally ionic, and are relatively non-corrosive.
Experimental Studies Of The Visible Absorption Spectrum Of Titanium (Iii) Acetylacetonate In Solutions And Rigid Glasses, Arthur L. Langhorst Jr.
Experimental Studies Of The Visible Absorption Spectrum Of Titanium (Iii) Acetylacetonate In Solutions And Rigid Glasses, Arthur L. Langhorst Jr.
Chemistry and Chemical Biology ETDs
Titanium (III) acetylacetonate was synthesized and the visible absorption spectrum was measured. A prominent absorption band, ymax at approximately 6000 was found with molar absorption coefficient of ~1000. The spectrum was investigated at temperatures ranging from 25 degrees C to 77 degrees K. At 7 7 degrees K the band was resolved into five well defined peaks at 4750, 5100, 5520, 5950 and 6460. An apparatus for obtaining spectrophotometric measurements of solution and rigid glasses was designed and fabricated.
The Synthesis Of Potential Antitumor Compounds, Duane L. Aldous
The Synthesis Of Potential Antitumor Compounds, Duane L. Aldous
Chemistry and Chemical Biology ETDs
The antitumor activity found in such ring systems as the purine, pyrazolo [3,4-d] pyrimidine, and the 8-azapurine prompted the preparation of the imidazo [4,5-d] pyridazine ring system. Castle and Seese were one of the first to study this ring system. 4-Aminoimidazo[4,5-d]pyridazine possessed some anitumor activity. This antitumor activity suggested the preparation of the 4,7-disubstituted-aminoimidazo{4,5-d]pyridazines reported here. The antileukemic activity reported for 6-purinethiol led to the synthesis of several 4- and/or 7-mono-and disubstitutedthioimidazo[4,5-d]pyridazines.
Spectroscopic Studies Of The Luminescences Of Rare Earth Chelates, Ruth Elaine Whan
Spectroscopic Studies Of The Luminescences Of Rare Earth Chelates, Ruth Elaine Whan
Chemistry and Chemical Biology ETDs
A variety of lanthanide chelates were prepared for preliminary luminescence studies under excitation by ultraviolet light. From these, chelates of benzoylacetone, dibenzoylmethane, tribenzoylmethane, and 8-hydroxyquinoline were selected for more extensive investigation. Energies of the lowest excited singlet and triplet states of the chelates were determined. Average values of 24,500 cm-1 and 20,500 cm-1 respectively were obtained for the dibenzoylmethides and 24,400 cm-1 and 21,450 cm-1 for the benzoylacetonates. Only small variations of a few hundred wavenumbers in the positions of the excited states were found as the chelated ion was varied.